Gun sight mount



Jan. lb, 1950 2 Sheets-Sheet l luren/rn' Jan. 10, 1950 E. l.. FOSTER2,493,865

GUN SIGHT MOUNT Filed Oct. l7, 1947 2 Sheets-Sheet 2 Afl IIIA

111 rel/tru J0 BY" 674m Patented Jan. 10, 1950 UNITED STATES yPATENTGFFICE GUN SIGHT MOUNT Emery L. Foster, Baytown, Mo.

Application October 17, 1947, Serial No. 780,431

3 Claims. 1

This invention relates to an improved mount for gun sights and moreparticularly to a mount adapted to be detachably disposed on a rie orother small firearms for adjustably supporting the rear sight or therear end of a telescope sight relatively to the firearm barrel.

More particularly, the primary object of the present invention is toprovide a rear sight mount which is so constructed that after initiallyzeroing in a firearm on which the mount is disposed ata plurality ofranges, said mount can belalniost instantaneously adjusted foraccuratelyadjusting the sight to any one of the-rangeslto which themount has been zeroed in thereby f'eliminating the need for employingguesswork in holding over or under a target at a range different fromthat at which the sights are set as is commonly required, especially inhunting.

A still further object of the invention is to provide a sight mount foruse with telescopic sights whereby the entire sight may be adjustedrelatively to the firearm barrel thereby eliminating the need fordisplacing the cross hairs of the sight either vertically orhorizontally with respect to the axis thereof thus eliminating thedistortion and inaccuracies which occur when the cross hairs of atelescope sight are moved away from the optical center of the lens.

Numerous other objects and advantages of the invention will hereinafterbecome more fully apparent from the following description of thedrawings illustrating a preferred embodiment thereof, and wherein:

Figure 1 is a side elevational view showing the novel sight mountsupported on a rifle or other firearm;

Figure 2 is a top plan view thereof;

Figures 3 and 4 are cross sectional views taken substantially along theplanes as indicated by the lines 3 3 and 4 4, respectively, of Figure 1;

Figure 5 is an exploded perspective View of the sight mount, and

Figure 6 is an end elevational view of the upper portion of the sightmount and shown equipped with a peep sight.

Referring more specifically to the drawings, for the purpose ofillustrating the preferred application and use of the sight mount,designated gendepending upon the size and shape of the barrel 8. Base Ihas screw fastenings I2 which extend transversely therethrough forengaging tapped recesses I4 of the receiver or barrel 8 to demountablysecure the mount 1 thereto. The mount 'I may be mounted on either sideof the receiver or barrel or the receiver tang, preferably as close tothe eye of the rer as possible.

The base I0 is provided with an integral barrel portion I which projectsfrom the outer side thereof and which communicates with the hollowinterior I6, as best seen in Figure 4, of the base I0. The barrel I5contains two rings I 'I and I8 which are rotatably disposed therein inside by side relationship and each of which is provided:

with a clamping screw I9 having an outwardly projected shank portionwhich extends through a circumferentially extending slot of the barrelI5 and so that the heads of the clamping screws I9 are disposedexternally of the barrel I5 and spaced, longitudinally of the barrel,from one another. Thus itis readily apparent that the rings II and I8may be rotated relatively to one another through an arc limited by thelength of the slots 20 and may be secured within the barrel I5 inadjusted positions relatively to one another by tightening the clampingscrews I9 thereof, the inner ends of which threadedly engage in therings II and I8.

A drum or disc 2I is journaled in the rings II and I8 and is provided atits outer end with an actuating lever arm 22 having a handle portion 23which is disposed outwardly of the barrel I5 and by means of which thedrum or disc ZI can be rotated within said rings I 'I and I8 and thebarrel I5. As best seen in Figure 4, the drum 2I is provided withlongitudinally spaced radially extending bores 24 each of which containsan expansion coil spring 25 and a pin which is erally 'I and comprisingthe invention, a portion of a barrel and/or receiver 8 and forearm 9 ofa rie or other firearm is illustrated.

The mount 1 includes a base I0 the inner face II of which is machined tofit flush against a portion of the barrel 8 and it will be readilyobvious that the shape of the face II may vary urged outwardly thereby.Said pins 26 and 2l are disposed to align with indentations 28 of therings I'I and I8, respectively, in certain posi# tions of the drum 2|relatively to said rings and for a purpose which will hereinafter becomeapparent.l The drum or disc 2I is provided at its inner end with aninwardly projecting eccen" trically disposed pin 29 which engages anopening v30 at the lower end of a link 3| and which is rotatablydisposed therein. The link 3I extends upwardly through the recess I6 ofthe base I0 and through a slot 32 in the top wall of said base I0.

As best seen in Figure 1, the base III is provided adjacent each endthereof with a bore,34 which extends vertically therethrough and whichis preferably but not necessarily non-circular in cross section. Each ofthe bores 34 reciprocally receives post 3-5, which posts are of the samecross sectional shape as the bores 34. The upper end of the posts 35 aresecured to and support an elongated head 36 which is disposed above thetop wall 33 of the base I0 and which, as best seen in Figure 5, isprovided at one side edge thereof and intermediate of its ends with anotch 31 to accommodate the upper end of the link 3| which is pivotallyconnected to the head 36 by a pin 36. A set screw 39 extends threadedlythrough the head 36 and the lower end thereof is adapated to abutagainst the top wall 33l for limiting the movement of the head towardthe top wall, and it will be readily apparent that the extent ofdownward movement of the head 36 may be' varied by adjustment of the setscrew 39.

A pair of guide rods 40 is fixed to and projects from the opposite sideedge of the head 36, said guide rods 40 extending transversely acrossthe top of the barrel 8. A cross bar 4| is secured to the opposite endsof the rods 40 and has a feed screw 42 extending threadedlytherethrough, the inner end of which extends and is journaled in asupport 43 which slideably engages the guide rods 40. The feed screw 42carries the clamping collars 44 which engage opposite sides of support43 for retaining said feed screw in rotatable engagement therewith andwhereby the sup ort may be adjusted longitlaiginally of the rod 4 andtransversely of the barrel 8 by rotation of the feed screw. In theembodiment of the invention illustr ted in Figures 1 to 5, the support43 is shown provided with an upstanding lug 45, which may be adjustablewith respect thereto and which is adapted to receive a slotted base 46of a clamp 41 which is detachably secured around the rear portion of thebarrel of a telescope sight 48. The slotted base 46 is provided withupstanding ears 49 which are pivotally connected to the base portion ofthe clamp 41. A base 50 is suitably secured to the upper portion of thebarrel 8, forwardly of the sight mount 1 and is provided with anupstanding stud for receiving the slotted base of an upstanding post 52which is preferably connected swivelly at 53 to the base portion of aclamp 54 which detachably engages the forward part of the barrel of thesight 48.

Assuming that the mount 1 is assembled, as previously described and thatthe telescope sight 48 is mounted thereon, as illustrated in Figure 1,the firearm is first zeroed in at the shortest desired range, forexample, 100 yards, by turning the lever 2| to cause the pin 29 to exerta push or pull on the link 3| for raising or lowering, respectively, thehead 36 and the support 43 carried thereby., The set screw 39 is thenturned until it engages the top wall 33 of the base I9 so that said head36 can thereafter not be lowered below the minimum range. The lever 22is then rotated clockwise, as seen in Figure 1 to elevate the support 43until the firearm is zeroed in at an intermediate range, desired by themarksman. By loosening the clamping screw I9 of the ring I 1, said ring.can then be rotated until the recess 28 thereof is disposed to receivethe pin 26 which will be projected into said recess by spring 25. Theclamp screw I9 of the ring I1 is then tightened to xedly position saidring relatively to the barrel I5. The outer ends of the pins 26 and 21are rounded so that when the lever 22 is thereafter turned clockwise tofurther elevate the support 43, the pin 26 will be cammed out ofengagement with recess 28 of the ring I1 so that the sight mount 1 canbe further elevated to zero in the telescope sight 48 of the firearm ata third, maximum range. The ring I8 is then turned until pin 21 engagesin the recess 28 thereof and is then clamped relatively to the barrel I5by tightening its clamp screw I9. It will thus be readily apparent thatthereafter the mount 1 can be readily adjusted to any one of the threeranges very rapidly and accurately. For example, to set the firearm forfiring at the shortest range the lever 2| is swung counter-clockwise asseen in Figure 1 to the extent of its movement or to adjust it to anintermediate range from its shortest range, said lever is turnedclockwise until rotation thereof is impeded by engagement of the pin 26with the indentation 28 of ring |1 which will be readily felt by themarksman. If it is desired to adjust the mount for the maximum range,lever 22 is forced beyond the intermediate position and turned clockwiseuntil the pin 21 seats in the indentation 28 of the ring I8.

Windage adjustments can be accomplished by rotating the feed screw 42 ineither direction depending upon whether it is desired to displace thesupport 43 to the left or right of the barrel 8.

It will be readily apparent, and as illustrated in Figure 6, that themount 1 is likewise readily adaptable for supporting a peep or opensight. In Figure 6, the mount 1 is shown provided with a support 43having a peep sight 55 projecting upwardly therefrom and preferablyfixed thereto and which is adapted for use in conjunction with aconventional front sight of a rifle or other firearm. Obviously, in lieuof the peep sight an open'sight, not shown, could be provided and theadjustment of said peep sight 55 or open sight by actuation of the sightmount 1 will be the same as previously described with respect to theadjustment thereof for the telescope sight 48.

Likewise, it will be readily obviously that by providing additionalrings |1 and I8 andadditional pins 26 or 21, that the mount 1 could beadapted for use at additional ranges.

Also by positioning the pin 29 on the other side of the verticalcenterof drum 2| the lever 22 when turned clockwise would adjust the sighttoward a shorter range and when rotated counterclockwise would adjustthe sight toward a longer range.

By having the lever 22 extending generally rearwardly from the drum 2|,said lever is disposed to be conveniently actuated by the thumb withoutremoving the hand from the grip or the finger from the trigger of thefirearm.

Various other modifications and changes are likewise contemplated andmay be obviously resorted to, without departing from the spirit or scopeof the invention as hereinafter dened by the appended claims.

I claim as my invention:

1. A gun sight mount comprising a base adapted to be detachably mountedagainst a side of a portion of a firearm barrel, a head disposed abovesaid base and slidably connected thereto for movement toward and awayfrom the base, guide means supported by said head and projectinglaterally therefrom and adapted to be disposed transversely across thebarrel, a sight supporting member mounted for sliding movement on saidguide means transversely of the barrel, a drum or disc rotatablydisposed in said base and adapted to be manually rotated relativelythereto, a link eccentrically connected to said drum or disc andpivotally connected to the head for raising and lowering the head,relatively to the base, when said drum or disc is revolved, said drum ordisc being provided with spring pressed detent members slideablydisposed for radial movement therein and projecting from the peripherythereof, said detent members being longitudinally spaced from oneanother, said base being provided with a barrel portion having aplurality of longitudinally spaced, circumferentially extending slots, aplurality of ring members rotatively disposed in said barrel portion andeach provided with a clamp member extending through one of said slotsand adjustable for clamping the ring thereof adjustably to the barrelportion, and each of said rings being provided with an inwardly openingindentation for receiving one of said detent elements releasably thereinwhereby said sight support may be adl justed accurately to variouselevations by manually rotating said drum or disc for selectivelypositioning the detents thereof in said indentations.

2. A gun sight mount comprising a base adapted to be detachably mountedagainst a side of a portion of a rearm barrel, a head disposed abovesaid base and slidably connected thereto for movement toward and awayfrom the base, guide' means supported by said head and proj ectinglaterally therefrom and adapted to be disposed transversely across thebarrel, a sight supporting member mounted for sliding movement on saidguide means transversely of the barrel, a drum or disc rotatablydisposed in said base and adapted to be manually rotated relativelythereto, a link eccentrically connected to said drum or disc andpivotally connected to the heahdfgr raising and lowering the head,relatively to thnbase,

whe a' or disc is revolved, said drum or disc being provided withlongitudinally spaced spring pressed detent elements projecting from theperiphery thereof, said base including a barrel portion, a plurality ofrings rotatably mounted in the barrel portion and in which the drum ordisc is rotatably supported, each of said rings having an inwardlyopening recess to releasably receive one of the detent elements in oneposition or rotation of the disc or drum, and means for adjustablyclamping the rings individually to the drum for varying thecircumferential spacing of the detent receiving recesses.

3. A gun sight mount comprising a base adapted to be detachably mountedagainst a side of a portion of a firearm barrel, a head disposed abovesaid base and slidably connected thereto for movement toward and awayfrom the base, guide means supported by said head and projectinglaterally therefrom and adapted to be disposed transversely across thebarrel, a sight supporting member mounted for sliding movement on saidguide means transversely of the barrel, a drum or disc rotatablydisposed in said base and adapted to be manually rotated relativelythereto, a link eccentrically connected to said drum or disc andpivotally connected to the head for raising and lowering the head,relatively to the base, when said drum or disc is revolved, said drum ordisc being provided with longitudinally spaced spring pressed detentelements projecting from the periphery thereof, and said base beingprovided with adjustably disposed means for releasably receiving saiddetent elements when the drum or disc is revolved and whereby said headmay be quickly and accurately adjusted to various elevations above thebase.

EMERY L. FOSTER.

REFERENCES CITED The following references are of record in the le ofthis |patent:

UNITED STATES PATENTS Number Name Date 656,867 Tolman Aug. 28, 19001,330,002 Price Feb. 3, 1920 1,970,623 Redfield Aug. 21, 1934 2,052,562Goudeau Sept. 1, 1936 FOREIGN PATENTS Number Country Date 101,181Australia 1937 212,530 Great Britain 1924

